DE8601943U1 - Thin-walled plastic container - Google Patents

Description

Dlpl.-Phy «. Heinrich Selds ■ patent attorney ■ Bierstadter Höhe 15 ■ P.O. Box 5105 · 6200 Wiesbaden 1 · ^ (0 61 21) 56 2022

Thin-walled plastic containers

The invention relates to a thin-walled container made of plastic, preferably in a cup shape, with itself from the bottom to peripheral wall widening the upper edge of the opening into which the im

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UfifcöF'öü Böf'ciCii a Stäpciriüg üiifc 6χϊΐ6Γ Our u shoulder and an upper stacking shoulder is formed in such a way that the same container of this type when put together a rod-like stack for receiving measured amounts of filler, such as powder coffee, suitable voids between the bottoms of adjacent containers are formed, with the part of the peripheral wall located above the stacking ring Furthermore, a retaining ring with at least two spaced one above the other, extending all around rows of wart-shaped, preferably dome-shaped projections is formed, of which the projections in at least one of these rows after the interior of the container and in at least another of these rows protrude to the outside of the container.

In a container of this type known from DE-OS 34 18 849 are two rows of dome-shaped projections in the peripheral wall provided and arranged in such a way that when containers are nested adjacent to a stack, in each case the lower row of dome-shaped ones extending all around Projections of the inner cup of the circumferential row of dome-shaped projections of the outer cup facing. The projections that are opposite one another and protrude from one another are partially formed into one another and thereby result in an effective clamping of the nested containers. This creates a stack of containers relatively stiff. The separation of the containers from the stack requires great force, which is relatively long Is to be exercised when separating the cups until the

Dlpl.-Phy ». Heinrich Setds · Patent Attorney · Blwstadtor Höhe 15 · Postfach 5105 ■ 6200 Wiesbadisn 1 · Ί? (0 61 21) 56 2022

have separated mutually deformed projections. The sealing of the formed between the bottoms of the adjacent containers Cavities are not supported by the holding devices formed in this way. The container known from DE-OS 34 18 849 therefore also have fitting rings molded into the stacking ring that hold the stacking shoulders should improve on each other. These FurikoiOfistoilo, which are frozen into the container wall, must be accurate are produced, and therefore make the production of such mass-produced articles more expensive.

There are also containers from DE-GM 80 07 815 and DE-GM 80 07 816 of this type are known in which a stacking ring limiting the axial mating of the container and the stacked ring Containers holding each other clamping wall areas are provided. These jammed wall areas can be as annular areas adjacent to the stacking ring or in the form of annular ribs away from the stacking ring be arranged. As in the case of the containers known from DE-OS 34 18 849, the same applies to those from DE-GM 80 0 '/ * 815 and DE-GM 80 07 816 known containers a very precise fitting of the Behaxcer is required in order to achieve a defined folding effect to reach.

Furthermore, from DE-OS 26 34 380 containers of the aforementioned Art known in which holding devices in the manner of circumferential rows of diamond-shaped projections and between these diamond-shaped projections to be passed through, pin-shaped Counter elements are formed. Also these diamond-shaped projections and the pin-shaped counter-elements must be designed with high precision in order, on the one hand, to ensure that the nested Container and on the other hand to ensure a smooth release of the container. Doing so tend to have a number of diamond-shaped projections and inter-engaging pin-like elements to ensure that the loosening of such a retaining element

^ S direction on the circumference of the container is not easy to use and therefore

Dipl.-Phys. Heinrich Seids Patent Attorney Bierstadter Höhe 15 PO Box 5105 6200 Wiesbaden 1 ° g (061 21) 562022

the container tends to tilt when it is separated from the stack.

While in DE-OS 34 18 849, DE-GM 80 07 815 and DE-GM 80 07 816 known containers a mutual rotation the container is difficult because of the clamping effect generated in the holding devices, leave the from DE-OS 26 34 38Ο known container in a stacked state no twisting at all.

From GB-PS 2 073 581, cup-shaped containers are finally known, in which both below and above of the stacking ring holding devices in the form of interlocking beads and grooves are formed. The one into the other Latched beads and grooves hold the nested containers in a mutual axial position, regardless of whether the stacking devices are seated securely and tightly all around or not consists. Mutual twisting of the stacked, interlocked containers is only possible by overcoming the The high friction generated by the interlocking grooves and beads.

In contrast, it is the object of the invention to provide an improved thin-walled container of the type specified at the beginning create that can be easily merged and locked together, with in plugged together, latched Condition of the container, the cavities formed between the container bottoms are air-tight and moisture-tight to the outside should be closed. Despite the secure mutual holding of the containers: in the stack and the highly effective sealing of the between the container bottoms The containers should easily move cavities axially from one another with only brief application of little force let separate. It should also be possible to easily rotate the containers in the stack.

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Diploma in Phys. Heinrich Seids Patent Attorney Bicrstadter Höhe 15 P.O. Box 5105 6200 Wiesbaden 1 Ίξ * (Ο 6121) 56 2022

This object is achieved in that the both stacking shoulders of the stacking ring with seat surfaces for full, air- and moisture-proof contact with the corresponding Seats are formed on the shoulders of the stack of adjacent containers in the stack and that the Retaining ring for latching one above the other at least one row of protruding towards the inside of the container Projections of a container with at least one row of projections protruding to the outside of the container adjacent cup is formed when plugged together, the axial width of the stacking ring and the mutual axial distance between a row of projections protruding towards the inside of the container and a row of protrusions protruding from the outside of the container are matched to one another in such a way that when plugged together, same containers, the seat surfaces on the stacking shoulders of adjacent containers are pressed into sealing contact the projections of the two interlocked rows crossed each other, but on their rear flanks still in mutual contact are under elastic tension.

In contrast to the known containers of the one group, in which only a mutual jamming of the plugged together Container takes place and in contrast to the known containers of the / wide group, in which a complete Latching of the nested containers occurs, according to the invention, that on the hall facility only an incomplete locking occurs, namely the opposing projections one above the other are carried away, but when the stacking shoulder is brought together on its rear flanks, it is still more elastic Stand tension. In this way it is achieved that the holding device has a constant axial force between the stack adjacent cups exerts to the stack shoulders constantly under the axial elastic force to stick together. Since, according to the invention, the pile shoulders

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DlpL-Phys. Heinrich Seids patent attorney Bierstadter Höhe 15. P.O. Box 5105 6200 Wiesbaden 1 'S * (0 6121) 56 20

are formed with sealing seat surfaces, results according to the invention an optimal seal between voids formed in the bottoms of adjacent containers. Even if a stack of containers according to the invention temporarily comes under the influence of laterally directed forces, the seal between the Container bottoms in the stack formed cavities are not canceled. Rather, the individual containers around a sufficient amount moved relative to each other and twisted against each other, so that they are under the im In the area of the retaining ring and in the area of the stacking ring, elastic tensions intentionally created a mutual Can take a position in which the secure seal formed between the container bottoms

1.5 cavities is guaranteed.

The separating or singling out of the containers according to the invention from the stack is carried out with a brief axial force possible. As soon as the locking connection between the rows of projections is canceled, there is practically free, mutual axial movement between adjacent containers. This is of particular advantage when such containers are used in vending machines, for example drinks machines, in the Stack of such containers are to be used.

In a preferred embodiment of the invention, at least one of the stacking shoulders of the stacking ring is preferably the lower stacking shoulder, on its peripheral edge with a surrounding the seat surface, elastic in the axial direction deformable curvature formed. This deformable curvature forms together with the remaining elastic bracing on the rear flanks of the rows of projections a substantial improvement in the seal. To the im Stack of assembled containers is then in fact a balance between those at the rear

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Dipl.-Phys. Heinrich Seids · Patent Attorney · Bierstadter Höhe IS. Postfc-ch 5105 6200 Wiesbaden 1 'S? (0 61? .L) 56 20

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Flanks of the projections maintained residual elastic tension and one by pressing against each other axially the elastic deformation of this bulge caused by the stacking shoulders. From the outside Forces acting on a stack of containers can therefore practically only change this equilibrium somewhat, not but lead to the lifting of the seat, which is in full, air- and moisture-tight contact, as long as it is such external forces are not suitable for breaking the load connection between the adjacent containers.

Preferably, the lower stacking shoulder on the stacking rank as the container bottom surrounding, axially downwardly projecting ring be formed. One of these, surrounding the bottom of the container, The ring protruding downwards is particularly attached to the upper stacking shoulder of a receiving container adaptable in the stack. At the same time, this forms the ring which surrounds the container base and protrudes axially downwards a particularly advantageous edge for the container.

In a preferred embodiment of the invention, the retaining ring has a lower and an upper row of projections, the lower row containing projections arranged close to one another and protruding towards the outside of the container and the upper row containing projections arranged at a mutual distance and projecting towards the inside of the container. The use of two rows of such protrusions and the formation of one ¹ - ¹ . The row with projections arranged close to one another and the other row with projections arranged at a mutual spacing provides the possibility of precisely determining the forces to be exerted on adjacent containers for mutual locking and for releasing the mutual locking. The closed lower row / of projections arranged close to one another and protruding from the outer container also forms a guide ring for the mutual

Dipl.-Phys, Heinrich Selds · Patcntanwall · Bterstadler Höhe IS · Postfach SlOS ■ 6200 Wiesbaden 1 · ° §? (Oil 21) S62022

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Spaced projections of the top row, so that a well-managed, mutual twisting of the neighboring ones Container is possible. However, this twisting is somewhat inhibited by the fact that the spaced apart Projections of the upper row slide from one to the next projection in the lower row 4 of these However, inhibiting the rotary movement is advantageous in order to prevent unwanted, uncontrolled rotation.

The arrangement of the projections in the two rows can be made in this embodiment of the invention, that the bottom row has about twice the number of projections | like the top row contains.

In the case of the container according to the invention, provision can also be made be that the projections projecting inside the container have different sizes from the projections projecting outside the container, the smaller projections are arranged close together in an uninterrupted row. For example, the bottom row be filled with closely spaced, smaller projections that protrude to the outside of the container.

From an exemplary embodiment of the invention is explained in more detail below with reference to the drawing. Show it:

Figure 1 three nested drinking cups, in a preferred embodiment of the Er

finding, the two outer cups in section and the innermost cup in side view are shown;

FIG. 2 shows detail 2 from FIG. 1 in an enlarged illustration;

FIG. 3 shows a functional diagram of the dome-shaped projections in the retaining ring and

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Dipl.-Phys, Helnrlcli Sclds ■ Patent attorney · Bierstadtor Höhe IS · Postfach 510.5 · 6200 Wiesbaden 1. ^ (0 6121) 562022

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Figure 4 shows the detail 4 of Figure 1 in an enlarged Depiction.

In the example shown, the drinking cups 10 have a one-piece peripheral wall 11 which is divided into three sections and which merges into a flanged lip edge 12 at its upper edge and into the cup base 13 at the lower edge. The lowermost Rsrei ch of Ilmfanaswand 11 is designed as a stacking ring 15, the axial width 15a of which - apart from the requirements for stacking - is also selected with regard to the desired volume of the receiving chamber for the filler. A retaining ring 16 with an upper annular part 16a and a lower annular part 16b is formed above the stacking ring. At the top of the retaining ring 1b is the region 17 of the circumferential wall 11 which occupies the substantial height of the cup 10 and in which piston-like guide ribs 18 extending in the circumferential direction are formed.

In the upper annular part 16a of the retaining ring 16 is an all-round row 19a of dome-shaped pre-cracks 19 formed which protrude towards the inside of the container. In the lower annular part 16b of the retaining ring 16 dome-shaped projections 20 projecting towards the outside of the container in a manner of a pearl necklace closed row 20a formed. As further shown in Figures 1 and 2, the lower annular portion 16b extends of the retaining ring 16 at its lower edge in the upper stacking shoulder 21 over, which on their arranged inside the container, upwardly facing side an annular, flat seat 23 forms. At its lower edge, the stacking ring 15 goes into a lower stacking shoulder 14 forming, the actual container bottom 13 surrounding, axially downwardly projecting ring. Also the lower one Stacking shoulder 14 is formed with a flat, annular seat surface 22, which, however, lies on the outside of the cup

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Dlpt.'Phys. Heinräch Sclds · Patent Attorney · Bierstadter Höhe IS. P.O. Box 5105 62Ü0 Wiesbaden 1 * §? (0 6121) 56 20

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and is directed downwards. The two seat surfaces 22 and 22 result - as FIG. 2 shows - when the cups are plugged together an annular seal for the cavity formed between the cup bottoms, also provides the annular Seat 22 is also a convenient base for using the cup * The transition from the Sfcapelring to the lower stacking shoulder 14 is in the example shown

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The two annular parts 16a and 16b of the retaining ring are essentially cylindrical and have a certain elasticity in the radial direction like this is indicated by the double arrows 16c and 16d in FIG.

As particularly FIGS. 2 and 3 show, the dome-shaped projections 19 formed in the upper annular part 16a and projecting towards the inside of the container are all around

at regular intervals

arranged and with a

Diameter D _{1n formed} in a radius of curvature R _1n , ι y ι y

The dome-shaped projections 20 in the lower annular part 16b have a uniform mutual spacing A ₁₀ over the entire circumference of the cup 10, a diameter Dp ₀ and a radius of curvature Rp ₀ - the radius of curvature R _{iq of} the dome-shaped projections 19 is greater than the radius of curvature R _{? (} , the dome-shaped projections The diameter D ₁ ″ of the dome-shaped projections 19 is greater than the diameter D _{20 of} the dome-shaped projections 20. Finally, the mutual distance A _{1q of} the dome-shaped projections 19 is considerably greater than the mutual distance A _{20 of} the dome-shaped projections 19, im This has the consequence that the dome-shaped projections 20 in the lower annular part 16b are arranged close to one another, while the dome-shaped projections 19 in the

Dipl.-Phys. Heinrich Selds · Patent Attorney · Bierstadler Höhe 15 · P.O. Box 5105. 6200 Wiesbaden 1 ° §? (0 6121) 56 2022

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upper annular part 16a uniform spaces have on the wall of the annular part 16a.

As FIG. 2 shows, the axial distance 15a between the upper one, which determines the width of the stacking ring 15, is Stacking shoulder 21 and the lower stacking shoulder 14 so on the width of the retaining ring 16 and the axial distance d.6F rows lyä üi'id 20ä of käiöttenrürmigen Projections 19 and 20 matched that when the two cups 10a and 10b are completely nested, that is when the seat surface 22 rests firmly on the lower stacking shoulder 14 on the inner cup 10b on the seat surface 23 the upper stacking shoulder 21 in the outer cup 10a the lower "; Row 20a from the inner cup 10b to the outside protruding dome-shaped projections 20 on the upper row 19a of protruding towards the interior of the container Dome-shaped projections 19 of the outer cup 10a is moved past in such a way that just a touch with elastic deformation of the opposing Dome-shaped projections 19 and 20 is given.

This produces the somewhat elastically deformed dome-shaped projections that are in contact and also the wall parts of the opposing annular parts 16a and 16t, which are deformed in a radially elastic manner of the retaining rings 16 of both cups 10a and 10b an elastic bracing that such an axial component which is suitable for compressing the seat surfaces 22 and 23 of the stacking shoulders 14 and 21, if necessary with slight elastic deformation of the bulge 14a on the lower stacking shoulder 14 of the inner cup 10b.

As FIG. 3 shows, the different distances 19a and 20a between the dome-shaped projections 19 or the dome-shaped Vasprüngen 20 achieved that see different engagement conditions between the dome-shaped projections 19 and the

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Dip! - Phys. Heinrich Seids · Patent Attorney · Bierstadter Höhe 15 · PO Box 5105 ■ 6200 Wiesbaden 1 · ⁰ ^ (0 61 21) 56 2022

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Set dome-shaped projections 20. In the example of Figure 3, the ratio between the distances 19a and the distances 20a such that nine smaller dome-shaped projections 20 five larger dome-shaped projections opposite and at the tenth smaller dome-shaped projection 20 and the sixth larger dome-shaped Projection 19 again the same engagement conditions prevail as with the first smaller dome-shaped projection 20 and the first larger dome projection 19 · Allow these different engagement conditions which extends over the circumference of the cups 10a and 20a of dome-shaped projections 19 and 20 under a certain amount elastic escapement move past each other, so that the cups 10a and 10b with overcoming a certain

j 15 braking effect are rotatable against each other.

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; As Figure 4 shows, is in the example shown for

The cavity provided for receiving filler material is arranged within the stacking ring 15. The cup bottom 13 is within the ring projecting axially downwards

ι 20 trained stacking shoulder arranged increased. This gives the cup a secure and stable stand during use.

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Claims (8)

PATENT ADVERTISEMENT DIPL.-PHYS. HEINRICH SEIDS 6200 Wiesbaden 1 · Bierstadter Höhe 15 · PO Box 5105 · Telephone (06121) 56 20 22 Postgiro-Kcnto Frankfurt / Main 1810 08-602 ■ Bank: Deutsche Bank 306 571 · Nass. Sparkasse 120 040 995 Wiesbaden, January 24, 1986 X 340 VNR 10 7565 F / lö Bellaplast GmbH Karl-Boscr-Straße 10 6200 Wiesbaden DE Thin-walled plastic container 1.) Thin-walled plastic container, preferably in the shape of a cup, with it from the bottom to the upper edge of the opening widening peripheral wall, in the lower area a stacking ring with a lower stacking shoulder and an upper stacking shoulder is formed in such a way that that when the same such egg containers are put together to form a rod-like stack for receiving them metered Quantities of filler, such as instant coffee, form suitable voids between the bottoms of adjacent containers be, with a retaining ring in the part of the peripheral wall located above the stacking ring at least two spaced one above the other and extending all around rows of wart-shaped, preferably dome-shaped projections is formed, of which the projections in at least one these rows to the inside of the container and in at least one other of these rows to the outside of the container protrude characterized in that the two stacking shoulders (14, 21) of the stacking ring (15) with seat surfaces (22, 23) for full, air-tight and moisture-proof contact with corresponding seat surfaces (22, 23) on the stacking shoulders (14, 21) from the stack Dipl.-Fhys. Heinrich Seids ■ Patent attorney ■ Bierstadter Höhe 15 · PO Box 5105 · 6200 Wiesbaden 1 · ° §? (0 61 21, '56 2022 barten containers (10a, 10b) are formed and that the retaining ring (16) to latch on top of each other at least one row (19a) of projections (19) of the one container (10a) protruding towards the inside of the container with at least one row (20a) of protruding projections (20) of an adjacent one on the outside of the container Container (10b) is formed when plugged together, the axial width (15a) of the Staoelringes (15) and the mutual axial distance between a row (19a) of projections protruding towards the interior of the container (19) and a row (20a) of projections (20) protruding towards the outside of the container in this way are coordinated so that when the same containers (10a, 10b) are put together, the seat surfaces (22, 23) on the stacking shoulders (14, 21) of adjacent containers (10a, 10b) pressed into mutual, sealing contact and the projections (19, 20) of the two interlocked rows (19a, 19b) crossed each other, but on their rear flanks still in mutual 3e- 2C agitation are under elastic tension. 2.) Container according to claim 1, characterized in that at least one of the stacking shoulders of the stacking ring (15), preferably the lower stacking shoulder (14) at its peripheral edge with a seat surface (22) surrounding it, is formed elastically deformable arch (1Ua) in the axial direction. 3.) Container according to claim 1 or 2, characterized in that the lower stacking shoulder (14) on the Stapelrirtg (15) 13t as a ring which surrounds the container base (13) and projects axially downwards. 4.) Container according to one of claims 1 to 3, characterized in that that the retaining ring (16) has a lower and an upper row (20a, 19a) of projections (20, 19) · «» - · »ft ··· ti ♦ · Dlpl.-Phye. Heinrich ScItIs · Patent Attorney ■ Blerstadtcr Höhe IS. P.O. Box 5105-6200 Wiesbaden 1. "Jg" (0 6121) 5620215 comprises, wherein the lower row (20a) arranged closely side by side, protruding to the outside of the container Projections (20) and the upper row (19a) arranged at a mutual distance, towards the interior of the container contains protruding protrusions (19), 5.) Container according to claim 4, characterized in that Δη_ number of projections (20) as the top row (19a) contains. 6.) Container according to one of claims 1 to 3, characterized in that that the projections (19) protruding from the inside of the container differ in size from which have protrusions (20) protruding towards the outside of the container, the smaller protrusions (20) are arranged close to one another in an uninterrupted row (2oa). 7.) Container according to claim 6, characterized in that the row (20a) of closely juxtaposed, Smaller protrusions (20) protruding towards the outside of the container just above the upper stacking shoulder (21) of the stacking ring (15) is arranged. 8.) Container according to one of claims 1 to 7, characterized in that the retaining ring (16) has an upper annular part (16a) with a substantially cylindrical wall and a circumferentially extending rows (19a) of projections (19a) protruding towards the inside of the container ) as well as a lower annular part (16b) with an essentially cylindrical wall but smaller in diameter than the upper annular part (16a) and a row (20a) of projections (20) which extends all around and which is formed in this cylindrical wall and extends outwards towards the container. having, the light-axial distance (I6e) between Dipl.-Phys. Heinrich Selds. Patent attorney · Blerstadter Höhe 15. P.O. Box 51ÖS 02ÖÖ Wiesbaden 1 ¹ ^ (Ö61 21) S62Ö22 these two rows of protrusions (19> 20), i.e. the axial distance from the lower edge of the iiich after the Inside the container extending projections | e (19) from the upper edge of the extending after the Behältfäüßieren Projections (20) is slightly smaller than the axial width (15a) of the stacking ring (15).